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MAN Energy Solutions

6G70ME-C9.6

Name: MAN Energy Solutions 6G70ME-C9.6
Brand: MAN Energy Solutions
SKU: OSE-38473

The MAN 6G70ME-C9.6 is a low‑speed, six‑cylinder two‑stroke marine diesel engine delivering up to 41 220 kW at 91 rpm, distinguished by its hydraulic camshaft system and advanced electronic control for Tier III emissions.

41220.0 kW

Power

Engine Specifications

Cylinders

700 mm

Bore

3256 mm

Stroke

41,220 kW

MCR Power

91.0 rpm

MCR RPM

2-stroke

Stroke Type

Family: MAN Energy Solutions ME/ME-C · Tier: Tier III · Fuel: HFO, VLSFO, MDO

Inspector Detail

▸

Designation decoded

6 = number of cylinders, G = Green Ultra Long Stroke, 70 = bore 700 mm, ME-C = MAN Electronically controlled Mark C, 9.6 = Mark 9.6 control generation.

Background

The 6G70ME-C9.6 is the current version of the powerful G70 platform. S/B=4.65, optimised for the lowest propeller speeds. For large containerships and VLCCs with conventional fuel.

Calculated metrics

Stroke To Bore Ratio

4.65

Inspector checklist

Fuel system

Fuel pumps: spray pattern 700mm
Cat Fines: <15 ppm
VLSFO

Running gear and tribology

700mm liners: wear, BN, honing pattern
Piston rings: thermal distortion at 700mm
Crosshead: S/B=4.65, 3256mm stroke, extreme side forces, LI
Stuffing box: long stroke, drainage

ME control system

HPS 300 bar: high flow rates
FIVA Mark 9.6
CCU

Turbocharger

Large unit
Cleaning
Scavenge air pressure

Logbook reference values

Parameter	Expected	Deviation means
Exhaust gas temperature	320-420 °C	>25 °C spread
Scavenge air pressure	2.5-3.8 bar	TC
Cylinder oil consumption	0.7-1.2 g/kWh	BN
Pmax	As per testbed +/-5 bar	Timing
OMD	<2.5% LEL	Stuffing box

Common Failure Modes

Cat Fine damage

Symptoms: Wear at 700mm

Causes: Separator

Preventive: <15 ppm.

Crosshead bearing damage

Symptoms: Knocking, LI, temperature

Causes: S/B=4.65, 3256mm

Preventive: LI every 8000 running hours.

Cold corrosion

Symptoms: Wear

Causes: BN

Preventive: Adjust BN.

Expert tips

💡 6G70ME-C9.6: latest version, optimal control system and efficiency.
💡 S/B=4.65 with 3256mm stroke remains demanding for the crosshead — prioritise LI.
💡 Mark 9.6 offers improved slow-steaming capability compared to older Marks.

Related components

Turbocharger Scavenge air cooler Separators Alpha Lubricator (6) HPS

Classification & regulatory

IMO Tier II. ECA: VLSFO/scrubber. EEDI Phase 3 for newbuildings.

Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.

Other Cylinder Configurations 50

Components & Design

Alpha Lubricator Control MAN Energy Solutions

MAN Alpha Lubricator Mk III

Feed rate 0.6-1.2 g/kWh depending on fuel sulfur. Monitor via Alpha ACC (Adaptive Cylinder lubrication Control).

Lead time: 6 wk

25.0 kg

Crankcase Oil Mist Detector Schaller Automation

Schaller Visatron VN215+ OMD

SOLAS mandatory. Test weekly. Clean sensor optics every 4,000 hrs. Replace reference cell every 2 years.

Lead time: 2 wk

8.0 kg

Crosshead Bearing MAN Energy Solutions

MAN Crosshead Bearing (thin-shell, white metal)

Inspect at 16,000 hrs. Check bearing clearance. Monitor via bearing temperature and oil analysis.

Lead time: 12 wk

380.0 kg

Cylinder Liner MAN Energy Solutions

MAN ME-C Cylinder Liner (bore-cooled)

Wear monitoring via calibration. Max wear 0.8% of bore. Replace typically at 32,000-60,000 hrs.

Lead time: 16 wk

3500.0 kg

Engine Control Unit (ECU / ECS) MAN Energy Solutions

MAN ECS (Engine Control System)

Dual-redundant ECU. Software updates via MAN PrimeServ. Keep backup CCU on board.

Lead time: 8 wk

45.0 kg

Exhaust Valve (& Valve Seat) MAN Energy Solutions

MAN Exhaust Valve (Nimonic/Stellite)

Overhaul at 8,000-12,000 hrs. Stellite-faced seat. Grinding/lapping at overhaul. Check spindle guide clearance.

Lead time: 8 wk

320.0 kg

FIVA Valve (ME-type) MAN Energy Solutions

MAN FIVA Valve (ME-C)

FIVA = Fuel Injection Valve Actuator. Overhaul at 8,000 hrs. Critical for timing accuracy.

Lead time: 8 wk

35.0 kg

Fuel Booster Module (ME-type) MAN Energy Solutions

MAN Fuel Booster Module

Overhaul at 16,000 hrs. Pressure test fuel pipes. Check plunger wear with micrometer.

Lead time: 12 wk

450.0 kg

Fuel Valve (Injector) MAN Energy Solutions

MAN ME-C Fuel Valve Assembly

Overhaul every 4,000-8,000 hrs. Pressure test after overhaul. Nozzle replacement at 8,000 hrs.

Lead time: 4 wk

85.0 kg

Governor (Electronic/Woodward) Woodward

Woodward 723PLUS Digital Governor

Electronic governor integrated with ECS on ME engines. Firmware updates via Woodward service.

Lead time: 4 wk

15.0 kg

Hydraulic Cylinder Unit (HCU) MAN Energy Solutions

MAN HCU (ME-C type, per cylinder)

One HCU per cylinder. FIVA valve overhaul at 8,000 hrs. Booster overhaul at 16,000 hrs.

Lead time: 12 wk

1200.0 kg

Hydraulic Power Supply (HPS) MAN Energy Solutions

MAN HPS Unit (ME-C)

Servo oil SAE 30 / System oil. Filter change every 4000 hrs. Monitor servo oil pressure.

Lead time: 16 wk

2800.0 kg

Main Bearings MAN Energy Solutions

MAN Main Bearing Shells (white metal/tri-metal)

Inspect at 16,000 hrs. Jack up crankshaft for clearance measurement. Replace at signs of overlay fatigue.

Lead time: 8 wk

250.0 kg

PMI (Pressure Measurement Indicator) MAN Energy Solutions

MAN PMI Sensor System

Online cylinder pressure monitoring. Calibrate sensors annually. Essential for combustion optimization.

Lead time: 4 wk

5.0 kg

Piston Crown MAN Energy Solutions

MAN ME-C Piston Crown (bore-cooled Cr-Mo steel)

Inspect at 16,000 hrs. Pull piston at 16,000-24,000 hrs. Check cooling bores with borescope.

Lead time: 16 wk

1800.0 kg

Piston Ring Pack MAN Energy Solutions

MAN Piston Ring Set (CPR / AL rings)

CPR (Controlled Pressure Relief) top ring. Replace at 8,000-16,000 hrs depending on wear.

Lead time: 4 wk

60.0 kg

Scavenge Air Cooler MAN Energy Solutions

MAN Scavenge Air Cooler (plate-type)

Clean air side every 4,000-8,000 hrs (chemical/HP water). Monitor pressure drop and charge air temp.

Lead time: 16 wk

5500.0 kg

Turbocharger Unit (ABB/MHI/Napier) ABB Turbocharging

ABB A175-L Turbocharger

Overhaul at 12,000-16,000 hrs. Water washing every 24-100 hrs depending on load.

Lead time: 12 wk

4500.0 kg

Technical Data

unified from engine model True

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Manuals

operating
MAN B&W ME/ME-C/ME-B Engine Operation (OM-ME-C)
MAN Energy Solutions
maintenance
MAN B&W ME/ME-C Maintenance Manual (MM-ME-C)
MAN Energy Solutions
spare_parts
MAN B&W ME/ME-C Illustrated Parts Catalogue (IPC-ME-C)
MAN Energy Solutions
service_letter
SL-ME Service Letters Collection (SL-ME)
MAN Energy Solutions
technical_data
MAN CEAS Engine Calculation Tool (CEAS)
MAN Energy Solutions

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Equipment Model #38473 · ✓ still in production